The ESP8266 is a highly integrated SoC designed for the connected world. It features a complete, self-contained WiFi networking solution on a single chip. The on-board processor with integrated storage functions as a standalone microcontroller with GPIO, providing an easy and inexpensive way to integrate with sensors and standalone devices.

The chip comes soldered to a breakout board with integrated antenna and associated components, making it easy to get up and running. Looking for an FCC/CE certified module you can solder directly into your project? Have a look at the module only version (83-16993)